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Reverse
bending test with swinging movements
(DO
9.21-4425, IEC EN 61386)
This standard is based on a cyclic reversed
bending test (pivoting) of conduits under
various conditions (temperature). The
conduits are dynamically loaded and evaluated
at the upper and lower application
temperature limits. The test is performed
based on IEC EN 61386. The minimum requirement
corresponds to the specifications
of IEC EN 61386. For PMA, the test
is not considered completed for final evaluation
until cracking or fracture. The number
of cycles to fracture determines the
fatigue strength of the conduit.
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